'Excimer’ fluorescence III. Lifetime studies of 1:2-benzanthracene derivatives in solution
'Excimer’ fluorescence III. Lifetime studies of 1:2-benzanthracene derivatives in solution
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“准分子”荧光 III. 1:2-苯并蒽衍生物在溶液中的寿命研究
DOI：
10.1098/rspa.1964.0021
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发表时间：
1964
期刊：
影响因子：
--
通讯作者：
T. King
中科院分区：
文献类型：
--
作者：
J. B. Birks;D. Dyson;T. King
对 1:2-苯并蒽及其 14 种甲基衍生物在稀脱氧环己烷溶液中的荧光寿命进行了观察。还在更浓缩的溶液中研究了 1:2-苯并蒽及其 5-、6-和 10-甲基衍生物。单体和准分子荧光成分的时间响应函数通过两种独立的方法测量，即相位和调制荧光计以及脉冲光源技术。还观察了稀溶液中单体荧光的量子效率以及浓溶液中相对准分子/单体荧光产率IDIM。分析结果以确定单体和准分子荧光以及准分子形成和解离的速率参数。研究发现，激发和非激发单体之间只有大约一半的碰撞会导致准分子形成。这种行为与芘的行为不同，它表明 1:2-苯并蒽衍生物中的准分子相互作用较弱。讨论了决定 IDIM 的因素。
Observations were made of the fluorescence lifetimes of 1:2-benzanthracene and fourteen of its methyl derivatives in dilute deoxygenated cyclohexane solutions. 1:2-benzanthracene and its 5-, 6- and 10-methyl derivatives were also studied in more concentrated solutions. The time response functions of the monomer and excimer fluorescence components were measured by two independent methods, namely the phase and modulation fluorometer and the pulsed light source techniques. The quantum efficiency of the monomer fluorescence in dilute solutions, and the relative excimer/monomer fluorescence yield IDIM in concentrated solutions, were also observed. The results are analyzed to determine the rate parameters of monomer and excimer fluorescence and of excimer formation and dissociation. It is found that only about half the collisions between excited and unexcited monomers result in excimer formation. This behaviour differs from that of pyrene and it is indicative of weaker excimer interaction in the 1:2-benzanthracene derivatives. The factors determining IDIM are discussed.